I like it when people identify themselves. It seems to me to be a little rude not to introduce yourself and sometimes those who do not seem more willing to be rude behind a mask. However, I think it makes little difference whether the identification is done is the user name or the signature. I do miss some of the user names since they often tell us more about the people behind the names (luvlabswithspots, got4girls, stukinstage2, or whatever). Thus, like most things in life, it's a choice with mixed benefits.